There are many different forms of carbohydrates ranging from pastas, sugars and breads to grains among others. Often times these carbohydrates are referred to as either simple or complex carbohydrates. There are a time and place where each of them should be used. For example, simple carbohydrates will cause a bigger insulin spike and are absorbed very rapidly, making them ideal for post workout consumption, where complex carbs are digested slowly over time. Adding complex carbs preworkout will provide a better continuous supply of energy throughout a workout.